<template>
  <div id="app">
    <router-view/>
  </div>
</template>

<script>
export default {
  name: "app",
  data() {
    return {};
  },
  watch: {},
  created() {
    // 在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem('store')) {
      this.$store.replaceState(
        Object.assign(
          {},
          this.$store.state,
          JSON.parse(sessionStorage.getItem('store'))
        )
      )
    }
    // 在页面刷新时将vuex里的信息保存到sessionStorage里
    // beforeunload事件在页面刷新时先触发
    window.addEventListener('beforeunload', () => {
      sessionStorage.setItem('store', JSON.stringify(this.$store.state))
    })
  },
  methods: {},
  computed: {}
};

String.prototype.format = function(args) {
  if (arguments.length > 0) {
    let result = this;
    if (arguments.length === 1 && typeof(args) == "object") {
      for (let key in args) {
        let reg = new RegExp("({" + key + "})", "g");
        result = result.replace(reg, args[key]);
      }
    } else {
      for (let i = 0; i < arguments.length; i++) {
        if (arguments[i] === undefined) {
          return "";
        } else {
          let reg = new RegExp("({[" + i + "]})", "g");
          result = result.replace(reg, arguments[i]);
        }
      }
    }
    return result;
  } else {
    return this;
  }
}
</script>
<style lang="scss">
#app {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
</style>
